So I downloaded some ...free software and opened the installer (never actually installed it), and windows firewall popped up immediately and asked to block "p2pnetwork". That spooked me and I tried to open the task manager with ctrl alt del, and it won't come up. I've tried right clicking the task bar > task manager, which does nothing, and start > run > taskmgr gives me this little gem: "Another program is using this file." I've tried restarting, and will be running Norton, along with spybot, adaware and CWShredder. Help?